*{
	padding: 0;
	margin: 0;
	list-style: none;
}
html, body, .show{
	width: 100%;
	height: 100%;
	background-color: #000;
}
.wrapper{
	width: 100%;
}
.wrapper li{
	width: 25%;
	display: inline-block;
	padding: 3px;
	box-sizing: border-box;
	overflow: hidden;
	opacity: 0.5;
}
.show{
	display: none;
	position: absolute;
	top: 0;
	left: 0;
}
.show img{
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	opacity: 0;
}